Update analytics.html

Author: jalammar

_includes/analytics.html

@@ -1,16 +1,12 @@
 {% if site.google_analytics %}
-	<!-- Google Analytics -->
+	<!-- Google tag (gtag.js) -->
+	<script async src="https://www.googletagmanager.com/gtag/js?id=G-R9S1R9LV9P"></script>
 	<script>
-		(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
-		(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
-		m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
-		})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+	  window.dataLayer = window.dataLayer || [];
+	  function gtag(){dataLayer.push(arguments);}
+	  gtag('js', new Date());
 
-		ga('create', '{{ site.google_analytics }}', 'auto');
-		ga('send', 'pageview', {
-		  'page': '{{ site.baseurl }}{{ page.url }}',
-		  'title': '{{ page.title | replace: "'", "\\'" }}'
-		});
+	  gtag('config', 'G-R9S1R9LV9P');
 	</script>
 	<!-- End Google Analytics -->
 {% endif %}